U.S. EPA Begins EV Charger Efficiency Program Development

Mon, 08/31/2015 - 15:07 -- MrGreen

Electric vehicle (EV) home chargers have caught the attention of the U.S. Environmental Protection Agency (EPA).

In its ENERGY STAR Electric Vehicle Supply Equipment scoping report, the EPA cites an International Energy Agency report that projects U.S. EVSE sales to grow from 85,000 units in 2015 to 500,000 units in 2020. Because the EVSE is only charging a vehicle a few hours per day, the EPA has identified a non-charging-state energy savings opportunity of up to 265 kWh per charger over 5 years. That could equate to a national energy savings of close to 4.8 GWh annually.

The agency recently kicked-off the development process for an ENERGY STAR specification for Level 1 and Level 2 EVSE1. A test method has been drafted with the help of the Department of Energy (DOE) and Lawrence Berkeley National Laboratory.

The EPA is currently seeking feedback from interested stakeholders on the test method draft as well as input on issues affecting an efficiency program specification. This includes:

  • Proposed product scope and product definitions
  • Proposed EVSE product test set up, including features such as network connectivity, automatic brightness control of EVSE displays, and occupancy sensors
  • Harmonization with existing or proposed standards

The agency plans to finalize the test method and publish a first draft program specification by year end. The program specification is expected to be finalized by Spring 2016. To become involved in the development process and to be added to the EVSE e-mail distribution list, send your contact information to For a copy of the proposed test method and other information, go to the ENERGY STAR EVSE webpage.

1. Level 1: a galvanically-connected EVSE with a single-phase input voltage nominally 120 volts AC and maximum output current ≤16 amps AC. Level 2: a galvanically-connected EVSE with a single-phase input voltage from 208 to 240 VAC and maximum output current > 16 amp VAC and < 80 amps AC